Adjustable bed frame



Feb. 12, 1963 J. MAGUIRE ADJUSTABLE BED FRAME j n www., d Ulm. I m QF w. 4. w d M .n

.l m/ a .w m w m. aldfe Mv. lllmllVlMllhhHwWmHllVM c V M 5 Jl wf wir? n.5. m m AW y U WM M Mem NMA HV JW iiiatented Feb. l2, i963 This invention relates to an adjustable bed frame.

lt is an object of my invention to provide a bed 'frame wh'c'n is adapted to be easily and quickly assembled by a completely unskilled person Without the use of any tools whatsoever and without the use of any conventional fastening members such as nuts, screws, bolts and the like. My bed frame structure is so simple that it is capable of being assembled or adjusted in the home by the ordinary home owner or housewife without any assistance whatsoever.

lt is a further object of my invention to provide such a bed trame which is adjustable in size, with such adjustments also capable of being made without the use or" tools or conventional fastening members.

Another object of my invention is to provide such a bed trame which is capable of being collapsed to a cornpact knocked-down form for easy shipment and handling.

A more particular object of my invention is to provide an improved adjustable bed frame in which the transversely extending cross members of the frame are telescopically connected to each other and in which they are locked into a-ed relationship with each other through the use oi a spring member having a cam action for providing surlieient trictional engagement between the telescoping frame members.

lt is accordingly an object of my invention to provide an adjustable bed trame having all of the benefits and advantages of the structure set forth above and described in detail hereinafter in this specification. My invention also comprises such other objects, advantages and capabilities as will later more fully appear and which are inherently possessed by my invention.

While i have shown in the accompanying drawings a preferred embodiment ot my invention, it should be understood that the same is susceptible of modiiication and change without departing from the spirit of my invention.

Referring to the drawings,

FiG. l is a top plan View of a complete bed frame in rnbled condition;

FG. 2 is an enlarged view or" one corner, showing the attachment of a cross member to the side rail and the attachment of a roller to the cross member;

lilG. 3 is a sectional view of the same, taken on line 3 3 of FlG. 2;

4 is a top plan View of one of the side rails with the attached cross members in collapsed or l-'.noclred-down postion;

FlG. 5 is an enlarged bottom plan View, partly broken away, showing the cam spring connection between the cross members;

FIG. 6 is a longitudinal sectional view of the same, taken on line 6 6 of PEG. 5.

A preferred embodiment which has been selected to illustrate my invention comprises a bed frame l@ having a pair or" side rails lll, which may be formed oi angle iron in the conventional manner. Each oi the side rails il thus comprises a side Wall l2 and a bottom wall i3. The head of the frame lll is provided with a pair of brackets lift for attaching a headboard lo'.

A pair of large channel cross members i6 are pivotally attached at one end thereof to one of the side rails il by pivot pins or rivets i7 which extend through the bottom walls l of the side rails il. A pair of complementarily formed small channel cross members 13 are pivotally attached at one end thereof to the other side rail ll in positions opposite the large channel members 16 by similar pivot pins or rivets i9.

A plurality of rollers 2l? are mounted beneath the cross members and It@ for moving the frame. While elongated rollers Ztl are shown, any suitable rollers or conventional casters may be used.

When the frame titl is in collapsed or knocked-down condition, the cross members 16 and ld are pivoted into positions in which they lie closely adjacent to and almost llel with the side rails il, as shown in FIG. 4 of the drawings.

in order to assemble the frame for use, the cross meinbers lo and l are pivoted outwardly away from the side rails ll. ot the side rails lll is provided along the bottom wall i3 thereof with a pair of stop members 2l, which may be punched or deformed downwardly beneath the bottom wall 13 adjacent to the rivets i7 and 19. When the cross members i6 and ld are pivoted into a postion in which they extend perpendicular to the side rails lll, they engage the stop members 2l, which prevent their further pivotal movement. The stop members 2l thus act as guides for the proper positioning of the cross members lo and iS.

Each of the cross members lo and 1S is channel-shaped in cross ection. rl'he large cross member lo includes a op wall 2?, a pair of side Walls 2S and a pair of inwardly lirected partial bottom walls Zd, which extend only a short distance inwardly from the side walls 23, the remainder of the bottom of the cross member lo being open. The small cross member 18 similarly includes a top Wall 25, a pair of side walls 26 and a pair of inwardly directed partial bottom walls 27.

The small cross members l are dimensioned to it slidably and telescopically within the larger cross members le, when inserted into the open ends thereof remote from the side rails lll. The cross members i6 and 13S are then telescopd together to provide the desired width ot bed frame. ln order to loclr the cross members lo and .ld together and prevent their further movement with respect to each other, a cam lock is provided which is simple to use and capable of quick manual operation without requiring any tools.

AnV axle pin 3b extends transversely across each of the small cross members i3 adjacent the end thereof remote from the side rail lil. A cam spring 3l is provided at one end with a plurality of coils S2, which extend around the axle pin 3i?. Adjacent the center of the cross member lb is an end coil 33 of gradually increased diameter. The portion of the end coil 33 which is disposed toward the top wall 2.5 of the cross member i8 and which is of substantially greater diameter than the coils 32 is provided with a plurality of spaced serrations 3d. Extending longitudinally along the cross member 13 from the end coil 33 is a straight portion 35, which terminates in a loop 56. The loop 36 extends laterally toward one side wah 26 of the cross member itl beyond the inner edge of the adjacent partial bottom wall 27.

The center of the top wall Z5 of the cross member i8 is provided with an elongated longitudinally directed slot 37, which is disposed directly adjacent to the end coil 33 i the cam spring l.

rhe cam `spring 3l is adapted to be manually moved etween two positions, in one oi which it .is unlocked or released and in the other of which it is locked or engaged to prevent movement of the cross members i6 and 2id with respect to each other.

The cam spring 3l is shown in its loclred position in FlGS. 5 and 6 of the drawings. ln such position, the ser- `rated portion of the end coil 33 extends completely through o the slot 37 so that .its serrations 34 engage the top wall 22 of the large cross member 16 to prevent any longitudinal movement of the eros-s members i6 and lb with respect to each other. The cam spring 3l is held in its locked position by the loop 36, which resiliently lits and is held beneath the partial bottom wall 27 of the cross member 1S. 1e cam spring 31 may be released by moving the loop 36 and straight portion 3S laterally against the inherent resilience of the cam spring 3l until the loop 36 is out from beneath the partial 'bottom wall 27 of the cross member 18. The loop 35 and straight portion 35 are then free to be rotated by the resilience of the cam spring 3l in a downward or clockwise direction. Rotation of the loop 36 and straight portion 35 causes the diametrically enlarged portion of the end coil 33 which carries the serratio-ns 34 to be rotatably disengaged from the top wall ZZ of the large cross member 16 as `a portion of the end coil 33 having a Ismaller diameter is brought into alignment with the slot 37. This diametrically smaller portion of the end coil 33 does not reach completely through the slot 37 and accordingly does not engage the top wall 22 of the large cross member 16.

The cam spring 31 may be returned to its locked position -by rotating the loop 36 and straight portion 35 in a counter-clockwise direction to move the serrations 34 of the end coil 33 through ythe slot 317 into engagement with the top wall 22 ofthe large cross member 16. The loop 36 is moved laterally to pass it around and -beneath the partial lbottom wall 27 beneath which it is held by the resilience of the cam spring 3l.

I claim:

l. In an adjustable bed frame having a pair of telescopically mounted cross members movable longitudinally with respect to each other to adjust the width of said bed frame, means for locking said cross members against such longitudinal movement, said means comprising an axle extending transversely across the inner cross member, a cam spring having at one end thereof a plurality of coils extending around said axle, said cam spring having an end coil, said end coil having a diameter gradualll increasing to a diameter substantially greater than that of the remainder of said coils, said end coil being disposed adjacent the center of said inner cross member, said inner cross member having a centrally disposed longitudinally directed slot disposed adjacent to said end coil, the diametrically -increased portion of said end coil being dimensioned to extend through said slot and engage the outer cross member, said portion having a plurality of seri-ations adapted to increase the rictional engagement between said end coil and said outer cross member, said cam spring having a straight portion extending substantially radially from said end coil, said `cam spring being movable between two positions, in one of which the serrated portion of said end coil extends through said slot and frictionally engages said outer cross member to lock said cross members against Ymovement, and in the other of which said cam spring is rotated to move the serrated portion of said end coil out of engagement with said outer cross member to permit longitudinal movement of said cro-ss members with respect to each other.

2. The structure described in claim l, the straight portion of said cam spring having a loop at the end thereof remote from said end coil, said loop extending laterally toward one side of |said inner cross member, said inner cross mem-ber having a partially closed wall, said loop being'adapted to t within said inner cross member and to be normally held therein by said wall, said earn spring when in locked posi-tion being disposed entirely within said cross member and being held therein by said wall, said loop and straight portion adapted to be moved laterally around said wall to permit the movement of said loop to and from said position with-in said inner cross member as said cam spring is moved between said positions.

3. ln an adjustable bed frame having a pair of tele`I scopically mounted cross members movable longitudinally with respect to each other to adjust the width of said bed frame, means for locking said cross members against Such movement, said means comprising a cam spring mounted on the inner cross mem-ber, said cam spring having a coil of gradually increasing diameter, said inner cross member having a slot disposed adjacent to said coil, the diametrically increased portion of said coil being dimensioned to extend through said slot and engage the outer cross member, said portion having a plurality of serrations adapted to increase the frictional engagement between said coil and said outer cross member, said cam spring being movable between two positions, in one of which the serrated portion of said coil extends through said slot and frictionally engages said outer cross member to lock said cross members against movement, and in the other of which said cam spring is rotated to move the serrated portion of said coil out of engagement with said outer cross member to permit longitudinal movement of said cross members with respect to each other.

4. In an adjustable bed frame having a pair of telescopically mounted cross members movable longitudinally with respect to each other to adjust the width of said bed frame, means for locking said cross members against such movement, said means comprising a cam spring mounted on the inner cross member, said cam spring having a coil of increased diameter, said inner cross member having a slot disposed adjacent to said coil, the diametrically increased portion of said coil being dimensie-ned to extend through said slot and engage the outer cross member, said cam spring being movable between two positions, in one of which the diametrically increased portion of said coil extends through said slot and frictionally engages said outer cross member to lock said cross members against movement, and in the other of which said cam spring is rotated to move said portion out of engagement with said outer cross member to permit longitudinal movement or" said cross members with respect to each other.

5. In an adjustable bed frame having a pair of telescopically mounted cross members movable longitudinally with respect to each other to adjust the width of said bed frame, means for locking said cross members against such longitudinal movement, said means comprising a cam spring having at one end an end coil, said end coil having a diameter greater than that of the remainder of said coils, said inner cross member having a longitudinally directed slot disposed adjacent to said end coil, the diametrically increased portion of said end coil being dimensie-ned to extend through said slot and engage the outer cross member, said portion having a plurality of serrations adapted to increase the frictional engagement between said end coil and said outer cross member, said cam spring having a straight portion extending substantially radially from said end coil, said cam spring being movable between two positions, in one of which the serrated portion of said end coil extends through said slot and trictionally engages said outer cross member to lock said cross members against movement, and in the other of which said cam spring is rotated to move the serrated portion of said end coil out of engagement with said o-uter cross member to permit longitudinal movement of said cross members with respect to each other.

6. in an adjustable bed frame having a pair of telescopicaliy mounted cross members movable longitudinally with respect to each other to adjust the width of said bed frame, means for locking said cross members against such movement, said means comprising a cam spring mounted on the inner cross member, said inner cross member having a slot disposed adjacent to said cam spring, said cam spring having an enlarged portion dimension/ed to extend through said slot and engage the outer cross member, said cam spring being movable between two positions, in one of which said enlarged portion of said cam spring extends through said slot and' rictionally engages said outer cross member to lockv said cross members against movement, and inthe other References Cited in the file of this patent of which cam spring is rotated to move said enlarged UNITED STATES PATENTS portion out of engagement with said outer cross member M n to permit longitudinal movement of said cross members 11630870 Smmck May 3% feg-27 with respect to each Other 5 2,262,939 Hem/ard Nov. 1, 1941 2,939,157 Roche June 7, 1960 

6. IN AN ADJUSTABLE BED FRAME HAVING A PAIR OF TELESCOPICALLY MOUNTED CROSS MEMBERS MOVABLE LONGITUDINALLY WITH RESPECT TO EACH OTHER TO ADJUST THE WIDTH OF SAID BED FRAME, MEANS FOR LOCKING SAID CROSS MEMBERS AGAINST SUCH MOVEMENT, SAID MEANS COMPRISING A CAM SPRING MOUNTED ON THE INNER CROSS MEMBER, SAID INNER CROSS MEMBER HAVING A SLOT DISPOSED ADJACENT TO SAID CAM SPRING, SAID CAM SPRING HAVING AN ENLARGED PORTION DIMENSIONED TO EXTEND THROUGH SAID SLOT AND ENGAGE THE OUTER CROSS MEMBER, SAID CAM SPRING BEING MOVABLE BETWEEN TWO POSITIONS, IN ONE OF WHICH SAID ENLARGED PORTION OF SAID CAM SPRING EXTENDS THROUGH SAID SLOT AND FRICTIONALLY ENGAGES SAID OUTER CROSS MEMBER TO LOCK SAID CROSS MEMBERS AGAINST MOVEMENT, AND IN THE OTHER OF WHICH CAM SPRING IS ROTATED TO MOVE SAID ENLARGED PORTION OUT OF ENGAGEMENT WITH SAID OUTER CROSS MEMBER TO PERMIT LONGITUDINAL MOVEMENT OF SAID CROSS MEMBERS WITH RESPECT TO EACH OTHER. 